Machine for manufacturing metal lath.



No. 654,765. l Patented .Iuly 3|'1 |900.

`J. SCHRATWIESER.

MACHINE FUR MANUFACTURING METAL LATI-I.

(App m d A @24, 189s.)

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2 shuts-snm (No modem W m m |NVENTOR No. 654,765. ,Patented July 3|, |900.'

J. SCHRATWll-'.SF.R.` MACHINE FUR MANUFACTURING METAL LATTLV (Application med 5.2518953 2 Sheets Sheet 2.

ATTORNEY NITED STATES PATENT OFFICE.

JACOB soHRArwIEsER, orV NEW YORK, N. Y.

MACHINE FOR MANUFACTURING METAI` LATH.

SPECIFICATION forming par@ of'Laers Patent No. 654,765, dated July s1, 1900.

Appuauan ined August .2418985 serieu Nassaizs. momma.)

To all whom t may concern:

Be it known that I, JACOB scHRArWmsER,

, a citizen of the United' States, residing in the borough of Brooklyn, city of New York,'oount7` of Kings, and State of New York, have invented'certain new and useful Improvements in the Manufacture of Metal Lath, of which the following is a specification.

My invention relates to improvements in the manufacture of metal lath from sheet metal, and particularly to meansfor operating upon the blank plates or sheets of metal from which the lath is manufactured, whereby the same is rendered serviceable for the purpose designed, and its objects are, among others, to provide reliable and efficacious means whereby the sheet metal 'may be so treated as to producea lath of strong and durable construction and which `will at the same time afford aproper key for the plaster when spread uponits surface; and to this end it consists of the construction of parts and arrangement of details hereinafter described and claimed, and illustrated in the' accompanying drawings referred to herein, like letters of reference indicating like parts in each ligure of the drawings.

In the said drawings, Figure I is a vertical medial cross-section of a machine for the manufacture of metal lath constructed in accordance with my invention. Fig., II is a plan view of the saine with certain partscut away. Fig. III is a side elevation of the same, illustrating the gearing ofthe machine.n Fig. IV is a vertical section of the cutting-dies during the operation of cutting the metal plate. ing-ridges on the rollers taken during the` operation of acuting the flanges of the metal plate. Fig. VI is a perspective view of a piece of the metal plate after passing through the machine.

The framework A, upon which the work-y ing parts of the deviceare mounted, is sustained byvsuitablelegs A and supports -tables A2, A3, A4, and A5, adapted'to carry the l sheet metal while passing through from one part to another of the machine. The table A2 leads to the oil-rollers BB', which co1nprise perforated cylinders surrounded peripherally by a layer of felt or other absorbent material 19. The upper roller is journaled othe r.

Fig. V is a Vertical section of the aoutupon the oil-supply pipe B2, passing through its center and having perforations at the part withinpthe cylinder through which the said 'cylinder receives rits oil-supply, the supply of oil from the pipe being controlled by the 'valveB .Beneath'the lower roller B is a drip-,pan B4, adapted to receive the drip from the rollers and also replenish the oil-supply 6o `of the said lower roller. The table A3 leads from the oil-roller to the perforating or cutting rollers C C', which` are journaled upon the framework, the lower roller C being journaled ina vertically-adjustable box, so that `the wear upon the cutting-dies may be oornpensated for by raising `the same, and thus bringing the dies into closer Contact. The upper roller C' has the female dies c sunk in its outer surface and the lower roller has the 7o male cutting-dies c thereon. Each roller is yprovided with an annular cutter c2 at or near the middle, the two cutters on the upper and lower rollers being complemental to `eachV p The purpose of these cutters is to yshear the'jsheet metal and divide it into sheets lof convenient width. On either side of each `of these cutters are annular beads and grooves,

the grooves c5l being on the upper roller C and the beads c4 on the lower roller C. The 8o object of these is to form a gutter along the s edge of each sheet of metal. Another bead` and groove may also be provided intermedi` ate the cutters and each edge of the roller for the purpose of forming a gutter in the center of each'sheetof metal lath, if desired. f

`A'n' upper and a lower row of finger-bars D lare located adjacent to the rollers C C' and lon the inner side thereof, having their bev- -elededges curved parallel to the curve of the 9o rollers, one of the said linger-bars projecting between each two annular rows of cutters c.

The object of these finger-bars is to strip the sheet of metal from the cutting-rollers and allow it to pass between them ontoV the table A5, leading to the 'acuting-rollers F F. The upper one of these rollers Fis provided with annular ridges f, `directly in line withthe cutters c, of somewhat greater thickness than said cutters and having 4V-shaped `inroo terstices f' at intervals corresponding to the length of the cutting-knives c and dies c, the l object of which will hereinafter appear. The lower roller F has a plain surface and, like the lower roller C, is journaled in a-vertically.

adjustablebox for the ypurpose of affording means for taking up the wear on the surface of the rollers.

The brush-rollers E E are located intermediate the cutting and acuting rollers and are geared in suchjajmanner as to revolve 1n the opposite direction from the rollers C C',

respectively, their bristles entering the dies of these rollers as they revolve and removing any dust or particles of metal from the metallicplatesinprocess of cutting which may adhere to the said rollers.

It will be seen that the dies c are slightly larger than is necessaryl to admit the en Vtrance Vof thecutting-dies c.

The object of this is to allow the edges of the cut made in the metal sheet by the knives to be `pressed intothe dies.

All the working parts of the machine are gearedtogether, revolving in the directions indicated by the arrows, Fig.- III; in such a manner that all thesurfaces which come in 'contactwith the metal sheets move at an equal rate of speed,\which insures that the said sheets will not tear or become crimped while passing through the machine, as these sheets are preferably of such length as to be in theact of passing through two or more of the rollers at the same time.

The operation of this device is as follows: The sheet of metal-to be treated is first placed on the table A2 andfed into the oil-rollers B B', where it receives acoating of oil on both sides, which reduces the friction on the dies and renders them less liable to overheating. It is then `passed by the said rollers to the cutting or perforating rollers C C. The cntters c on the lower roller being V-shaped will rst cut the metal and then asrthey enter the dies c will spread the edges of the cut, turningiianges h on either side and h at the forward end thereof, which anges project at right angles from the sheet. The V-shaped flanges h. are caused by the abrupt forward edges of the knives c, which strike the sheet at an acute angle and turn as they pass therethrough until they reach a position at y 'right angles to the sheet. The sheet of metal from the rollers by the iinger-bars D D next passes from the table A5 to the acuting-rollers F F', where the ridges f, passing through be tween the two flanges of each perforation uponthe upper side of the-sheet, bend them outwardly until they project at an acute angle to the said sheet, while at the same time the beveled interstices f', passing over the V- shaped flanges or ears 7i', acute them to the same extent as the iianges h. The metal sheetthen passes from the acuting-rollers over the table-A4 into any suitable receptacle which may be provided therefor. The metal lath thus produced consists of the flat plate or sheet H, with rectangular apertures 71.2 vand acute anges h h on three sides thereof, and

it will be readily seen that when plaster is spread upon a lath of this construction it will enter between the main surfaces of the sheet and the flanges, thus forming a dovetail key to retain the same in place. The Iianges h also when the lath is used for walls with the apertures h2 vertically disposed will preventl theplaster from slipping downwardlybefore it becomes dried and hardened.

1 In a machine for the manufacture of metallic lath, the combination of a plurality of primary rollers bearing complemental perforating-dies, and a plurality of secondary rollers one of which bears a series of annular ridges having interstices at' intervals corresponding to the length of the cutting-dies on the primary rollers 2. In a machine for ,the manufacture of metal lath, the combination of a .plurality of primary rollers bearing complemental perforating-dies, and a plurality of secondary rollers, one of which bears a series of annular ridges of greater thickness than said perforating-dies and in line with the same, and theV other a plain surface.

3. In a Vmachine for the manufacture of metallic lath, the combination of a pluralityV of primary rollers bearing complemental perforating-dies, the male dies arranged in annular rings with annular apertures between, and the female dies arranged inlike manner with shoulders corresponding to said apertures, and a plurality of secondary rollers one of which bears a series of annular ridges.V

In testimony whereof I have hereunto set my hand, this 9th day of August, 1898, atthe city of New York, N. Y. f

JAooB s cHRATwIEsnrt.

`In presence of- I F. M. SENIOR, C. RAY Cox.

IIO 

